STOCKHOLDERS’ EQUITY AND REDEEMABLE NONCONTROLLING INTERESTS - Accumulated Other Comprehensive Income (Loss), Net of Tax (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at the beginning	$ 685,154	$ 482,187
Other comprehensive income (loss) before reclassifications	18,424	(15,447)
Adjustments for items reclassified to earnings, net of tax	1,576	1,402
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX	20,000	(14,045)
Balance at the end	648,553	448,531
Total AOCI
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at the beginning	(326,802)	(289,949)
Balance at the end	(306,802)	(303,994)
Currency Translation Adjustments
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at the beginning	(160,914)	(123,991)
Other comprehensive income (loss) before reclassifications	24,213	(16,262)
Adjustments for items reclassified to earnings, net of tax	0	0
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX	24,213	(16,262)
Balance at the end	(136,701)	(140,253)
Employee Benefit Plans
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at the beginning	(165,888)	(165,958)
Other comprehensive income (loss) before reclassifications	(5,789)	815
Adjustments for items reclassified to earnings, net of tax	1,576	1,402
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX	(4,213)	2,217
Balance at the end	(170,101)	(163,741)
Amount Attributable to Noncontrolling Interests
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at the beginning	(60)	1
Other comprehensive income (loss) before reclassifications	24	0
Adjustments for items reclassified to earnings, net of tax	0	0
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX	24	0
Balance at the end	(36)	1
Total Lazard AOCI
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at the beginning	(326,742)	(289,950)
Other comprehensive income (loss) before reclassifications	18,400	(15,447)
Adjustments for items reclassified to earnings, net of tax	1,576	1,402
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX	19,976	(14,045)
Balance at the end	$ (306,766)	$ (303,995)